From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6AAF0C2B9F7 for ; Mon, 24 May 2021 15:23:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 49DB0613F2 for ; Mon, 24 May 2021 15:23:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235072AbhEXPYf (ORCPT ); Mon, 24 May 2021 11:24:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:40172 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233481AbhEXPGO (ORCPT ); Mon, 24 May 2021 11:06:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 988356162B; Mon, 24 May 2021 14:51:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621867873; bh=JB+XAR5JtrB+x/U79H63DAkfAF0TATzHm4+NdNpp6qI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sEBwOpA8eYsCV6Dzt+UOAn8vUJ4/47YV1U9xVij3Wx0zBa1hlLYeZvfuO8QNOd0ri NzPccWWWa5vJlMorQlL69mZftNCqZbmVPVKimqNUnRUBQDJ4e1zMZNkJ3bLkrMvl2E o7+uq2eYJg7AHAp9L3RHKLPURXX//fds3nKWgSexu9sKJipqlLmaVSgpwGPvdUgwYz +CIvoD2hcv7bB3SertskbLMXs6I8e+xvQa6Tjw3XK+UVn5WibecJNJ5VivqA+lOHQq 9Bx7v9DrLfmFULOxxp9xLUTSTRMW5Xz2+liIzASkEWvQ3yVmMTPBWOyinqq1+1SASs IVcBCa3YwUsTQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tom Seewald , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 4.9 05/19] char: hpet: add checks after calling ioremap Date: Mon, 24 May 2021 10:50:52 -0400 Message-Id: <20210524145106.2499571-5-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210524145106.2499571-1-sashal@kernel.org> References: <20210524145106.2499571-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tom Seewald [ Upstream commit b11701c933112d49b808dee01cb7ff854ba6a77a ] The function hpet_resources() calls ioremap() two times, but in both cases it does not check if ioremap() returned a null pointer. Fix this by adding null pointer checks and returning an appropriate error. Signed-off-by: Tom Seewald Link: https://lore.kernel.org/r/20210503115736.2104747-30-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/char/hpet.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index bedfd2412ec1..7975ddd40b35 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -976,6 +976,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data) if (ACPI_SUCCESS(status)) { hdp->hd_phys_address = addr.address.minimum; hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length); + if (!hdp->hd_address) + return AE_ERROR; if (hpet_is_known(hdp)) { iounmap(hdp->hd_address); @@ -989,6 +991,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data) hdp->hd_phys_address = fixmem32->address; hdp->hd_address = ioremap(fixmem32->address, HPET_RANGE_SIZE); + if (!hdp->hd_address) + return AE_ERROR; if (hpet_is_known(hdp)) { iounmap(hdp->hd_address); -- 2.30.2